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排序方式: 共有234条查询结果,搜索用时 156 毫秒
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142.
被动全向声纳浮标跟踪潜艇的优化布放方法 总被引:1,自引:0,他引:1
反潜飞机利用被动全向声纳浮标可以隐蔽地跟踪潜艇,但浮标消耗量大。在满足定位精度的条件下,如何优化布放浮标以便有效增加跟踪时间是一个亟待解决的问题。首先分析了浮标探测性能和浮标群相对位置对定位精度的影响,得到浮标布放的五种基本原则;然后结合水下目标跟踪技术提出了两种用被动全向声纳浮标跟踪潜艇的优化布放方法:一种是利用遗传算法来优化每一枚浮标的布放位置,另一种是将一批次投放2-4枚浮标的多维优化问题简单转换成一维优化问题来确定浮标的布放位置。最后仿真计算了这两种方法的跟踪性能及浮标消耗量。仿真结果表明,两种优化布放方法均能满足跟踪要求,前者的浮标消耗量比后者略少,但后者的投放批次少很多,有利于减少人员的工作量。 相似文献
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为了解决防空火力分配问题,首先运用NSGA-II算法求出Pareto最优解集,然后运用多属性决策方法对Pareto最优解集中的解进行综合评估,并从中找出一个最优解。用区间数定性描述各属性,建立了防空火力分配的三目标优化模型。描述了NSGA-II算法和多属性决策方法的运算步骤。在仿真算例中,得到了一个最佳防空火力分配方案,说明该方法对于防空火力分配问题有良好的应用价值。 相似文献
145.
姚得水 《中国人民武装警察部队学院学报》2011,27(3):31-33
"人质事件"的应急处置策略、过程和结果,不仅关系着人质的安全与利益,也直接影响到政府的反恐政策及立场、能力与施政水平,关系到政府在民众心目中的权威、地位和形象。处置恐怖劫持人质事件中现场指挥员面临着巨大的压力和挑战。能否采取武力强攻以及何时采取武力强攻,是指挥员运筹决策的关键点,权衡利弊、对比分析,按照"两害相权取其轻、两利相权取其重"的原则,进行量化评估,寻求最佳方案。 相似文献
146.
状态可靠性的装备视情维修决策分析 总被引:1,自引:0,他引:1
针对连续劣化的多设备系统在不同劣化水平下都可能发生失效,依据设备实际劣化状态评定可靠性的思想,提出运用状态可靠性理论刻画设备或部件的劣化水平与随机故障之间的关系,可对设备实际劣化状态进行可靠性评定,适用于表征同类设备或部件的不同个体在不同的工作负荷和工作环境下经历不同的劣化过程后的不同可靠性指标,反映了连续劣化系统的随... 相似文献
147.
Andrew Monaghan 《战略研究杂志》2013,36(6):987-1013
Russia has consistently opposed US hegemony since the early 1990s. Moscow has sought to create a world overseen by the UN Security Council and several power centres supporting an anti-hegemonic axis. Until recently, Russia's resources have been very limited. Russian opposition therefore was largely conceptual or a work in progress. Russian policy was largely reactive – and non-confrontational. However, the failure of the Russia-US relationship to develop practically has highlighted negative views of US hegemony, and the greater wealth generated through high energy prices is supporting an increasingly active Russian policy. 相似文献
148.
Jonathan Schroden 《Small Wars & Insurgencies》2014,25(2):479-486
In September 2011, the Commander of the International Security Assistance Force (ISAF) in Afghanistan directed the Afghan Assessment Group to redesign the way in which ISAF was assessing the status of the war, and to be ‘revolutionary’ in so doing. The resulting assessment paradigm was novel, non-doctrinal, and effectively addressed the unique complexities of the counterinsurgency in Afghanistan and the needs of the ISAF Commander. It had a two-tier structure consisting of both strategic and campaign assessments. The former focused on answering a set of strategic questions in narrative, analytic form to address the strategic environment, while the latter used a set of standards and accompanying narrative responses to gauge accomplishment of campaign tasks. Both tiers captured the current state of the war while maintaining an eye on future challenges and opportunities. The two assessments and their associated processes were designed to stimulate discussions leading directly to decisions by senior leaders on actions they could take, direct, or request. While any assessment paradigm will have advantages and disadvantages, an examination of the pros and cons of this assessment paradigm makes clear that it should be considered a ‘best practice’ in the field of counterinsurgency assessment. 相似文献
149.
杨润生 《军械工程学院学报》1993,(1)
本文在分析高速数据采集电路的基础上,采用单片机技术,设计了一种通用性能好、分析频带宽的瞬态信号测试系统。该系统成功地解决了采样速度和频率分辩率的矛盾,提供了一种解决瞬态波形测量的有效方法。 相似文献
150.
Hans Liwång 《Defense & Security Analysis》2017,33(1):30-44
Risk management is a decision-support process and a vital tool for military planning and decision-making. Today, several nations utilize risk-based approaches to analyze the level of security in military operations. There are both strengths and challenges in applying risk-based approaches to support military decisions. In this article, the challenges related to risk communication are investigated with the aim of describing how a military organization should train to create a good environment for effective risk communication. The analysis finds that it is important for the organization to define and consistently use a shared risk understanding. Such a shared risk understanding will need a systematic development process that focuses on the future decision makers’ and analysts’ education and training. To reach understanding, all involved parties must have the chance to identify the problem, reflect on its implications, test different solutions and develop a solution. 相似文献